CVE-2026-68314 net: mctp i3c: clean up notifier and buses if driver register fails
A failure in MCTP I3C driver registration leaves dangling pointers and leaked memory, potentially causing system instability or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-68314?
CVE-2026-68314 is a high-severity memory corruption vulnerability in Linux, published on 10 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: mctp i3c: clean up notifier and buses if driver register fails
mctp_i3c_mod_init() registers the I3C bus notifier and then walks the existing buses with i3c_for_each_bus_locked(mctp_i3c_bus_add_new, NULL) before registering the I3C device driver. If i3c_driver_register() fails, the function returns the error directly, leaving the notifier registered and every mctp_i3c_bus object created for the existing buses allocated. The notifier is left pointing into the module that failed to load and the bus list is leaked.
Mirror the module exit path on this failure: unregister the notifier and tear down the buses that were added before returning the error.
This issue was identified during our ongoing static-analysis research while reviewing kernel code.
Which versions are affected by CVE-2026-68314?
How do I fix CVE-2026-68314?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-68314 being exploited?
There is no known exploitation of CVE-2026-68314 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68314, DEBIAN-CVE-2026-68314, GHSA-432r-7fw5-c4hj, UBUNTU-CVE-2026-68314.